Include HTML of selected element

[bilogic]

What happened

1. I selected the Tell me more button
2. But when I press </>, I don't see the button HTML (Annex A)
3. If I click parent, I see more than button (Annex B)

What I expected

When select button and click </>, I should see HTML of red box (Annex B)

Annex A

Annex B